These officially licensed 300 T-Shirts, 300 Junior Tees and 300 Hats are influenced by:300 is a 2007 film adaptation of the graphic novel 300 by Frank Miller, and is a fictionalized retelling of the Battle of Thermopylae. In the film, the Spartan King Leonidas and 300 Spartans fight to the last man against Persian King Xerxes and his army of over one million soldiers.